Question about 2002 Pontiac Grand Am
There are a few items that will make your Pontiac run hot.
A plugged radiator, a thermostat sticking closed, something in front of the car reducing airflow through the radiator, pinched coolant hoses, low coolant levels, gaskets leaking internally and radiator cooling fans not working.
Water pumps rarely cause overheating unless they are leaking out coolant or the belt isn't turning the pulley.
There are the the answers to your question. I hope you find the source of your problem easily and inexpensively.
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Posted on Nov 11, 2010
Water pump is most obvious as the impeller is plastic on a metal drive shaft and they do often come loose ,a sticking thermostat would cause the problem as would a blocked radiator ,if its radiator just put the internal heater on full and see if runs cool with heater on ,could be cooling fan not cutting in when engine hot ,but if your driving along and its running hot then something is wrong as the engine doesnt need the fan on when in motion as the air flow will keep it cool ,its more for stop start driving .So if its running hot whilst driving along with no stopping it could be the radiator blocked or the cooling tubes filled with mud so hose down of the outside of the rad .A head gasket would cause the system to pressurise and lose water this would be visable by starting the engine with rad cap off and seeing if it starts to push the water up .
Posted on Nov 10, 2010
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Posted on Jan 02, 2017
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